package com.rds.web.controller.common;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.amazonaws.services.s3.model.PutObjectResult;
import com.rds.common.constant.S3Constants;
import com.rds.common.utils.SecurityUtils;
import com.rds.common.utils.file.FileS3UploadUtils;
import com.rds.system.mapper.DocumentMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.rds.common.config.RdsConfig;
import com.rds.common.constant.Constants;
import com.rds.common.core.domain.AjaxResult;
import com.rds.common.utils.StringUtils;
import com.rds.common.utils.file.FileUploadUtils;
import com.rds.common.utils.file.FileUtils;
import com.rds.framework.config.ServerConfig;

/**
 * 通用请求处理
 * 
 * @author rds
 */
@RestController
@RequestMapping("/common")
public class CommonController
{
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;
    @Autowired
    private DocumentMapper documentMapper;
	private static final String FILE_DELIMETER = ",";
    /**
     * 通用下载请求
     * 
     * @param fileName 文件名称
     * @param delete 是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            if (!FileUtils.checkAllowDownload(fileName))
            {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RdsConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete)
            {
                FileUtils.deleteFile(filePath);
            }
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RdsConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception
    {
        try
        {
            // 上传文件路径
            String filePath = RdsConfig.getUploadPath();
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files)
            {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                urls.add(url);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        try
        {
            if (!FileUtils.checkAllowDownload(resource))
            {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RdsConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        }
        catch (Exception e)
        {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求
     */
    @PostMapping("/common/uploadFile")
    public AjaxResult uploadFileS3(MultipartFile file) throws Exception
    {
        try
        {
            File newfile = null;
            String originalFilename = file.getOriginalFilename();
            String filename = originalFilename.substring(0, originalFilename.lastIndexOf("."));
            String format = originalFilename.substring(originalFilename.lastIndexOf("."));

            newfile=File.createTempFile(filename, format);
            file.transferTo(newfile);
            newfile.deleteOnExit();

            PutObjectResult ss = FileS3UploadUtils.putObject(S3Constants.BUCKET_NAME, originalFilename, newfile);


            //String fileName = originalFilename;
            String url = S3Constants.BUCKET_NAME+"/"+originalFilename;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("fileName", originalFilename);
            ajax.put("url", url);
            return ajax;
        }
        catch (Exception e)
        {
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 获取下载链接，如果没有从S3下载到服务器，再返回链接
     *
     * @param bucketName 路径
     * @param objectKey 名称
     */
    @GetMapping("/common/S3download")
    public AjaxResult fileDownloadS3(String bucketName,String objectKey,String docId)
    {
        Long stateId = Long.valueOf(documentMapper.selectDocumentById(Long.valueOf(docId)).getStateid());
        if(SecurityUtils.verifyPermissions("download", String.valueOf(stateId))){
            return AjaxResult.error("您没有此状态的下载权限！");
        }
        if(bucketName!=null && objectKey!=null){
            String filePath = RdsConfig.getDownloadPath();
            FileS3UploadUtils.getObject(bucketName,objectKey,filePath);
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", "/file/download/"+objectKey);
            return ajax;
        }else{
            return AjaxResult.error("参数错误！");
        }
    }

}
